Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Cylinder, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-424 A CYLNIAXORP0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-424 0   624H ONVOY SPECTRUM, LLC 630   2024-03-17   
712-424 1   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-424 2   221F ONVOY, LLC - IA 630   2021-05-05   
712-424 3   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-424 4   221F ONVOY, LLC - IA 630   2021-09-04   
712-424 7   508J CENTURYLINK COMMUNICATIONS, LLC 630   2016-12-23   
712-424 9   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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